counting people: populationmrsjonesgeography.weebly.com/.../population_power_point1.pdf ·...
TRANSCRIPT
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Population
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Lesson Objectives
Students will be able to describe two main
reasons why the world’s population is
rapidly increasing.
Students will be able to explain some of
the problems that rapid population growth
is causing.
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Counting People: Population
Population is the total number of people who live in a particular place.
Geographers study population to understand where people live and why they live there.
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Demography
The study of
population is called
demographics.
Scientists who study
demographics are
called
demographers.
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How fast is the World Growing?
The world’s population increases by about three
people every second. That’s nearly 200 people
a minute, 10,000 people an hour, and 240,000
people a day.
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Population Data
Average Family Size
The average number of children in a family in a particular
culture group or region.
Birth Rate
The number of babies born per year per thousand people.
Death Rate
The number of people who die per year per thousand people.
Doubling Time
The time needed for a population to increase 100 percent
(double)
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Life Expectancy
-The average number of
years people live.
Population Growth Rate
-How quickly a population
grows each year,
measured by percentage.
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Population Pyramid
is a bar graph that depicts a total population by
breaking it down into age groups and gender.
Population Density
Means how close together people live in a particular
place.
To find population density, divide the number of people in a place
by the total area of that place.
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Population Pyramid: Afghanistan
How many females in your age group?
How many males?
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Population Pyramid: Denmark
How many females in your age group?
How many males?
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Hong Kong –one of the most densely
populated places in the world.
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Population Density
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Largest Countries
By Area (sq. miles)
Russia 6,592,800
Canada 3,851,809
China 3,732,396
USA 3,691,795
Brazil 3,286,470
Australia 2,966,136
By Population
China 1.3 billion
India 1.2
USA 314 million
Indonesia 237
Brazil 194
Pakistan 181
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distribution of the world's
population
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distribution of the world's wealth
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global CO2 emissions
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Doubling
Imagine that all the years from A.D. 1 to the year A.D. 2000 took place in just 24 hours. Now you have an imaginary clock to measure how fast the world’s population is growing. The list below shows that the Earth’s population doubled several times in those 24 hours.
12:00 a.m. 200 million people in the world
7:48 p.m. Population doubles to 400 million
10:12 p.m. Population doubles to 800 million
11:00 p.m. Population double to 1.6 billion
11:35 p.m. Population doubles to 3.2 billion
11:59 p.m. Population will double to 6.4 billion
During the 24 hours, how many times has the world’s population doubled. How long did it take for the world population to double the first time? The last time?
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B.C. to 2000 World Population
What was the world’s population in 1800?
A.1.5 Billion B.1 Billion
C.3 Billion D..5 Million
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Reasons for Population Growth
Farming methods
have greatly
increased the world’s
food supply.
Green Revolution –
protect crops, less
water, new fertilizers,
and new varieties.
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Reasons for Population Growth
Scientific
Advancements in
Medicine and Health.
Surgery
Vaccines
Preventative
Antibiotics
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The Challenges of Population
Growth
Using resources faster
Shortage of fresh water
Shortage of energy
Scarcity of food
Not enough money to
purchase food
People of India spend
80% of money on
food.
United States less
than 10%
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The Challenges of Population
Growth
People can’t find jobs. Perpetual Education Fund –LDS church
Not enough schools to educate the growing number of children
Public services like transportation and sanitation are inadequate.
Deforestation – India and Pakistan
Lack of trees affect the supply of clean air.
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How much grain do…
Americans consume?
approximately 2,000 lbs/year.
poorer people like Indians consume?
approximately 400 lbs/year.
Americans consume directly (food grains)?
only 150 lbs. (most is fed to livestock)
Indians consume directly (feed grains)?
almost all: little can be spared for animals.
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Some countries use more than their
fair share of resources
It takes 5 times as much soil, water,
& fertilizer to feed a person in the
U.S. than in places like India!
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Urban vs. Rural
Half of the earth’s people live in cities and towns. This is called urban.
The other half live on farms or in countryside villages. This is called rural.
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Urban Words
City, or metropolis – a large or important town.
Megalopolis – very big city, having cities grow into each other. Wasatch Front, New York,
Suburbs – residential districts lying just outside a city. Referred to sometimes as bedroom communities.
Eagle Mtn, Ranches, Saratoga Shores?